Never heard of eMTB Lite except for the new mode available on new Moustache bikes, but that is not available to any other manufacturers.
As far as I know there is no alternative to the Kiox controller. I don't have a problem with it. I just use it.
I had the Shimano Levers under the handlebar, but prefer the buttons on the top so the seat controller can go below.
Like I say, I don't have problems with it. Occasionally when things get wild and hectic I push the wrong button and look at the kiox and it says something like "Do you really want to reset your Kms, delete all software and format your motor?"
YES-Maybe-Delay-Ask later, where I am not sure what to select... or how. But this doesn't happen often.